54 Transactions of the Society. 



a list of localities where fossil Foraminifera are to be found/ 

 Until this moment the only species recorded from the Paris Basin 

 were Lenticidina rotulata and Lituola nautiloidea and difformis, 

 described by Lamarck,- and copied by Parkinson,'^ Bowdich,* and 

 Defrance.^ D'Orbigny says he might have published this Memoir 

 two years earlier, but that he wished to render the work more 

 complete, and had, to that end, examined the Chalk and strata of 

 Meudon, St. Germain, and Sens, of the banks of the Seine as far as 

 the Dejiartments of Yonne and Aube, to which were added Chalk 

 from Cipley received from d'Archiac, and from Fauquemart 

 received from " M. Dumont," resulting in a record of fifty-four 

 species of Foraminifera. It is here that we see the first signs of his 

 pet theory of Foraminifera as zone determinants, to which he was 

 passionately attached to the end of his life, and he applies his 

 theory in a table to the whole of the strata examined by him, 

 arriving thereby at conclusions identical with those of d'Archiac. 



With the exception of Cristcllaria rotulata, {supra and note 2) 

 and Lituola nautiloidea, to which synonymies are attached, the 

 whole of the species in this Memoir are described as new to science. 

 He renames his Rotalina truncatidinoides (Canary Islands) Eotalina 

 micheliniana, claiming that the Paris species differs in the absence 

 of an umbilicus and of raised sutural lines on the superior surface. 

 As we have seen {ante, p. 18), these two are now regarded as 

 synonymous. 



XL — The Vienna Memoir. 



Like the Cuba Memoir, d'Orbigny's " Foraminif eres Fossiles 

 du Bassin Tertiaire de Vienne " "^ is a work complete in itself, 

 embracing in its scope the whole Order of the Foraminifera, 

 whether recorded from the Vienna material or not, and bearing 

 the same relation to the fossil forms as the Ciiba Memoir bears to 

 the recent. I think there is little doubt that by the time this was 



' He tells us (p. 3, note) that von Hauer is sending him fossil Foraminifera 

 from Transylvania and Vienna, and Lyell from the Crag of England. 



2 " M6moire sur les Fossiles des Environs de Paris," Paris, 1802-1806. As to 

 the former species d'Orbigny claimed it as his, on the principle referred to ante 

 (p. 45), making it Cristellaria rotulata d'Orbigny, instead of (Lamarck). 



^ " Organic Remains of a Former World." London, 1804-11, iii., figs. 4-7. 



■■ "Elements of Conchology." Paris, 1820-22, pi. 18. 



^ Defrance, Diet. Sci. Nat. Articles Lituole and Lenticuline. 



" " Poraminiferes Fossiles du Bassin Tertiaire de Vienne (Autriche) decouverts 

 par Son Excellence le Chevalier Joseph de Hauer . . . et decrits par Alcide 

 d'Orbigny. Ouvrage publie sous les auspices de Sa Majeste I'Empereur d'Autriche,' 

 Paris, 1846, pp. 312, pis. 1-21. Text in German and French. This is the first 

 title-page upon which d'Orbigny recorded all his titles, degrees, honours, member- 

 ship of Societies, Academies, etc. 



